Car been off battery for 6++ months

tinnsoldaten · 03-07-2014, 01:38 PM

I been doing upgrades on my car , full service to the engine , new injectors , vanos solenoids , waterpump , thermostat , lp fuel sensor , various gaskets ...

Anyway , the car was left during winter and first now I start to put it all together.

My concern is , when battery has been off that long , what surprises can I see when I hook it back up ?

Anything I can fix with my trustworthy INPA?

scottp999 · 03-07-2014, 02:02 PM

I had my original battery (2007) out of the car for 18+ months when I had a lightweight battery. I probably only charged it twice during that time. I got rid of the lightweight battery, put the original back in and it has been fine the last couple of years and is now 7 years old. The key may have been that it was stored in a garage that always stays between 55-75 F. Not sure.

Went to getbmwparts today to do local pickup of a new bmw battery so I have no let downs this year. 7 years is pretty good from original battery.

tinnsoldaten · 03-07-2014, 02:06 PM

My battery is also new , put it in few months before I started upgrades.

pwr hungry · 03-07-2014, 04:18 PM

I'm pretty sure he means the car had the battery disconnected for many months, will the car throw any codes or have an issues from not having a battery attached to it for do long.

tinnsoldaten · 03-07-2014, 09:21 PM

Correct

pwr hungry · 03-07-2014, 09:34 PM

Quote:

Originally Posted by tinnsoldaten

Correct

I'm actually curious about this too. I've had mine disconnected for the past four months doing the same thing...

Brule · 03-08-2014, 02:44 AM

+1 for 3 months installing RB's and water pump.

I can't see why it would throw codes unless something is not plugged in.

roadkillrob · 03-08-2014, 07:07 AM

It really makes no difference how long the battery is disconnected - if it is disconnected for an hour or a year, there is no power in the car and anything that needed power to remember it's settings, will forget them. Otherwise, it should have no effect, put it back on and reset the clock and reset the auto windows and sunroof and should be good.

03-07-2014, 01:38 PM	#1
tinnsoldaten Captain 34 Rep 715 Posts Drives: e92 335i coupe Join Date: Dec 2008 Location: Bergen iTrader: (1)	Car been off battery for 6++ months I been doing upgrades on my car , full service to the engine , new injectors , vanos solenoids , waterpump , thermostat , lp fuel sensor , various gaskets ... Anyway , the car was left during winter and first now I start to put it all together. My concern is , when battery has been off that long , what surprises can I see when I hook it back up ? Anything I can fix with my trustworthy INPA? __________________ Vargas S2 turbos\|VAC S3 Cylinder head\|RR DPs\|RR MPs\|Supersprint X pipe\|Remus Quad Sport mufflers\|aFe Stage 2 Si with scoops\|Forge DVs\|ER CP\|BMS meth elbow\|Aquamist HFS-4\|Walbro 450 E85 LPFP\|AA FMIC\|BMS OCC\|MHD\|P3 Boost Gauge\|Ohlins Road & Track + camberplates\|M3 sways F/R+ Ground control endlinks\|Vorsteiner v303 19"\|Michelin PS2 sport\|Quaife LSD\|Vorsteiner V35 CF hood\|CF CLS trunk\|Duke Dynamics quad diffusor
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03-07-2014, 02:02 PM	#2
scottp999 Brigadier General 133 Rep 4,764 Posts Drives: 4runner SR5 Join Date: Mar 2007 Location: MD iTrader: (2) Garage List 2007 BMW 335 [9.00]	I had my original battery (2007) out of the car for 18+ months when I had a lightweight battery. I probably only charged it twice during that time. I got rid of the lightweight battery, put the original back in and it has been fine the last couple of years and is now 7 years old. The key may have been that it was stored in a garage that always stays between 55-75 F. Not sure. Went to getbmwparts today to do local pickup of a new bmw battery so I have no let downs this year. 7 years is pretty good from original battery.
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03-07-2014, 02:06 PM	#3
tinnsoldaten Captain 34 Rep 715 Posts Drives: e92 335i coupe Join Date: Dec 2008 Location: Bergen iTrader: (1)	My battery is also new , put it in few months before I started upgrades. __________________ Vargas S2 turbos\|VAC S3 Cylinder head\|RR DPs\|RR MPs\|Supersprint X pipe\|Remus Quad Sport mufflers\|aFe Stage 2 Si with scoops\|Forge DVs\|ER CP\|BMS meth elbow\|Aquamist HFS-4\|Walbro 450 E85 LPFP\|AA FMIC\|BMS OCC\|MHD\|P3 Boost Gauge\|Ohlins Road & Track + camberplates\|M3 sways F/R+ Ground control endlinks\|Vorsteiner v303 19"\|Michelin PS2 sport\|Quaife LSD\|Vorsteiner V35 CF hood\|CF CLS trunk\|Duke Dynamics quad diffusor
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03-07-2014, 04:18 PM	#4
pwr hungry Banned 41 Rep 1,257 Posts Drives: 335 Join Date: Mar 2013 Location: Amer'ca iTrader: (2)	I'm pretty sure he means the car had the battery disconnected for many months, will the car throw any codes or have an issues from not having a battery attached to it for do long.
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03-07-2014, 09:21 PM	#5
tinnsoldaten Captain 34 Rep 715 Posts Drives: e92 335i coupe Join Date: Dec 2008 Location: Bergen iTrader: (1)	Correct __________________ Vargas S2 turbos\|VAC S3 Cylinder head\|RR DPs\|RR MPs\|Supersprint X pipe\|Remus Quad Sport mufflers\|aFe Stage 2 Si with scoops\|Forge DVs\|ER CP\|BMS meth elbow\|Aquamist HFS-4\|Walbro 450 E85 LPFP\|AA FMIC\|BMS OCC\|MHD\|P3 Boost Gauge\|Ohlins Road & Track + camberplates\|M3 sways F/R+ Ground control endlinks\|Vorsteiner v303 19"\|Michelin PS2 sport\|Quaife LSD\|Vorsteiner V35 CF hood\|CF CLS trunk\|Duke Dynamics quad diffusor
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03-08-2014, 02:44 AM	#7
Brule Brigadier General 827 Rep 3,189 Posts Drives: 2007 335i e92 6spd man Join Date: Jul 2013 Location: Darwin iTrader: (0)	+1 for 3 months installing RB's and water pump. I can't see why it would throw codes unless something is not plugged in.
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03-08-2014, 07:07 AM	#8
roadkillrob Major General 863 Rep 5,448 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: Boston iTrader: (15)	It really makes no difference how long the battery is disconnected - if it is disconnected for an hour or a year, there is no power in the car and anything that needed power to remember it's settings, will forget them. Otherwise, it should have no effect, put it back on and reset the clock and reset the auto windows and sunroof and should be good. __________________ 2022 X3M Brooklyn Grey 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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